One of the better app ideas to come along in a while is Horizon, which corrects one of the most annoying aspects of using an iPhone to create video. Just start up the app, and regardless of how you're holding your phone, it'll start recording the footage in landscape mode. In other words, as long as you're using the app, no more portrait-oriented videos.

Horizon accomplishes this sorcery by employing the accelerometer and gyroscope built in to the iPhone to ensure that footage stays in landscape mode. According to a writeup in 9to5Mac, "It works by measuring the tilt of the phone and then offsetting the effect digitally by rotating the video by the same amount in the other direction."

On older models, this might prove to be a bit of a demand on the processor, but newer models such as the iPhone 5 and 5s should be able to handle it just fine. 9to5Mac reports that in their own test with an iPhone 5s, it corrected a one-minute clip i less than a second.

Naturally, such trickery means that you'll lose some detail in the final video as a result of the cropping involved, and allegedly you'll see some "stutter" if you shake the device too much while filming. Be sure to check out the video for more insights into how the process works. Now if we could only convince Apple to make this a built-in feature of the iPhone itself.

Horizon's currently on sale in the App Store for a dollar, so be sure to pick it up soon.